Heat Rate Optimization

The objective of this module is to discuss how the operator can manipulate the factors affecting boiler efficiency (as discussed in the previous module) in order to achieve the most efficient boiler operation.

On completion of this video and workbook exercises, the participant should be able to understand the following concepts and apply them in day to day work practice.

• Fuel availability at the boiler.
• Reasons for low steam pressure.
• The effect that silica content has on limiting operating pressure.
• How attemperator problems affect steam temperature.
• Using draft pressures as an indication of gas path plugging.
• How burner tilts, burner levels, and auxiliary dampers can be manipulated to adjust steam temperatures.
• How the quantity of excess air must be balanced between the effect on steam temperatures and control of losses.
• The use of sootblowing to maintain steam temperatures and the natural water circulation.
• Furnace heat transfer, convection pass heat transfer, and air heater operation.
• Control of flue gas exit temperature.
• The requirements for complete combustion, in practice.
• Minimizing air leakage into the furnace.
• How combustion air temperature can be manipulated.
• Using supplementary fuel oil for flame stabilization.